Left menu: when you add your own menu item, you now choose its icon from the full Font Awesome icon library (with a search) and pick the colour of its square, with a live preview.
Left menu: the settings screen now says clearly that you can drag a menu item into the “Available menu items” column to remove it from the menu, and drag it back whenever you want.
Fix
Left menu: menu items you add yourself only accept safe links (a page of your workspace, a web address, an e-mail address or a phone number) and plain-text titles, so a menu item can no longer be used to run harmful code in the browser.
